TY - JOUR
T1 - High-Frequency Voltage-Injection Methods and Observer Design for Initial Position Detection of Permanent Magnet Synchronous Machines
AU - Jin, Xinhai
AU - Ni, Ronggang
AU - Chen, Wei
AU - Blaabjerg, Frede
AU - Xu, Dianguo
PY - 2018/9
Y1 - 2018/9
N2 - The information of the initial rotor position is essential for smooth start up and robust control of Permanent Magnet Synchronous Machines (PMSMs). RoTating Voltage Injection (RTVI) methods in the stationary reference frame have been commonly adopted to detect the initial rotor position at standstill without any position sensors. However, alt-hough the Pulsating sqUare-wave Voltage Injection (PUVI) method performs better in estimation time and accuracy, it is rarely used because the estimation result may converge to the q-axis. In this paper, this fault convergence is avoided by modifying the initial states of the position observer, and the PUVI method can finally be used for robust initial rotor position detection. Modified signal processing techniques are proposed for both RTVI and PUVI methods for better implementations in fixed point processors and easier observer gain designs. Detailed comparisons between these two methods are provided. Furthermore, two position estimation observers, i.e. the Proportional-Integral (PI) observer and the Extended State Observer (ESO) are compared, and their parameter tuning methods are studied as well. Both simulation and experimental results are provided for verifications.
AB - The information of the initial rotor position is essential for smooth start up and robust control of Permanent Magnet Synchronous Machines (PMSMs). RoTating Voltage Injection (RTVI) methods in the stationary reference frame have been commonly adopted to detect the initial rotor position at standstill without any position sensors. However, alt-hough the Pulsating sqUare-wave Voltage Injection (PUVI) method performs better in estimation time and accuracy, it is rarely used because the estimation result may converge to the q-axis. In this paper, this fault convergence is avoided by modifying the initial states of the position observer, and the PUVI method can finally be used for robust initial rotor position detection. Modified signal processing techniques are proposed for both RTVI and PUVI methods for better implementations in fixed point processors and easier observer gain designs. Detailed comparisons between these two methods are provided. Furthermore, two position estimation observers, i.e. the Proportional-Integral (PI) observer and the Extended State Observer (ESO) are compared, and their parameter tuning methods are studied as well. Both simulation and experimental results are provided for verifications.
KW - Initial rotor position detection
KW - Observer
KW - Permanent Magnet Synchronous Machine (PMSM)
KW - Position sensorless control
KW - Square-wave voltage injection
UR - http://www.scopus.com/inward/record.url?scp=85034214176&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2017.2773094
DO - 10.1109/TPEL.2017.2773094
M3 - Journal article
AN - SCOPUS:85034214176
SN - 0885-8993
VL - 33
SP - 7971
EP - 7979
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 9
ER -